hi sotv, I had a trial run yesterday of the cheap unbranded one I acquired. It very hot very quick with a bag of bbq coals, and then I used oak logs a neighbour gave me to try.
It was a bit faffy but the temp kept within 200-250F and I decided last minute to add some chicken. It cooked and goto a temp of 130F internally so we finished off in our oven. Probably too much smoke flavour for me, not unpleasant, it burnt a thin blue smoke, and the oak was kiln dried, but needs more experimenting. Probably just continue with charcoal going forward and adding smaller wood chunks to get the flavour right. I guess chicken isn't as forgiving as red meats. All in all, nice day, fire, meat and friends, what could be better.